Which statement about confined spaces is true?

• A. They are always large enough for a person to occupy.
• B. They are open to the outdoor environment.
• C. They are enclosed spaces not designed for people to occupy.
• D. They require no safety precautions.

Answer: (C)

Confined spaces are enclosed or largely enclosed spaces that aren’t designed for people to occupy for extended periods, often with limited entry and exit and possible hazardous conditions. The statement that best fits this idea describes such spaces as enclosed and not designed for people to occupy, which captures why these areas are hazardous and require proper safety precautions. Size isn’t the defining factor—some confined spaces can be quite large, yet still not intended for regular occupancy. Being open to the outdoor environment isn’t true for confined spaces, which are defined by enclosure. And they certainly do require safety precautions, not the opposite.